Valve device

Abstract

The utility model discloses a valve device which comprises an electromagnetic assembly, a coil assembly and a sealing limiting piece, the sealing limiting piece is located between the electromagnetic assembly and the coil assembly, one part of the sealing limiting piece is connected with the electromagnetic assembly in a sealed mode, and the other part of the sealing limiting piece is connected with the coil assembly in a sealed mode. The sealing limiting piece and the coil assembly are arranged in a circumferential limiting manner, so that on one hand, the sealing performance between the electromagnetic assembly and the coil assembly can be enhanced by arranging the sealing limiting piece, and on the other hand, the circumferential position of the coil assembly can be conveniently limited by arranging the sealing limiting piece and the coil assembly in a circumferential limiting manner; compared with at least two independent parts for realizing corresponding functions, the valve device provided by the embodiment of the utility model has the advantages that the composite functions of sealing of the valve device and circumferential limiting of the coil assembly can be realized through the sealing limiting part, and the structure of the valve device is simplified conveniently.

Description

TECHNICAL FIELD

[0001] The utility model relates to a valve device in the technical field of heat management. BACKGROUND

[0002] Generally, the electromagnetic assembly and the coil assembly can be integrated on the expansion valve, and the core body of the electromagnetic assembly can be controlled to act by the on-off electricity of the coil assembly to realize the on-off of the fluid. However, the existing valve device needs to meet more functions, and multiple structural parts need to be arranged to meet multiple functions, so that the structure of the valve device is complex. SUMMARY

[0003] The utility model discloses a valve device, which can realize the sealing performance between the electromagnetic assembly and the coil assembly on one hand, and can also limit the circumferential position of the coil assembly on the other hand, thereby simplifying the structure of the valve device.

[0004] The utility model discloses a valve device, which comprises an electromagnetic assembly, a coil assembly and a sealing limiting part. The sealing limiting part is located between the electromagnetic assembly and the coil assembly. One part of the sealing limiting part is sealingly connected with the electromagnetic assembly, and the other part of the sealing limiting part is sealingly connected with the coil assembly. The sealing limiting part is circumferentially limited with the coil assembly.

[0005] According to the valve device provided by the utility model, the sealing limiting part is located between the electromagnetic assembly and the coil assembly, and one part of the sealing limiting part is sealingly connected with the electromagnetic assembly, and the other part is sealingly connected with the coil assembly. Therefore, by arranging the sealing limiting part, the sealing performance between the electromagnetic assembly and the coil assembly can be enhanced on one hand, and on the other hand, the sealing limiting part is circumferentially limited with the coil assembly, so that the circumferential position of the coil assembly can be limited. Compared with arranging at least two separate parts to realize the corresponding functions, the valve device provided in the utility model embodiment can realize the combined functions of sealing and circumferential limiting of the coil assembly by the sealing limiting part, thereby simplifying the structure of the valve device. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 is the cross-sectional structure schematic view of the valve device provided by the utility model embodiment;

[0007] Figure 2 is the explosion structure schematic view of the valve device provided by the utility model embodiment;

[0008] Figure 3 is the structure schematic view of the electromagnetic assembly provided by the utility model embodiment;

[0009] Figure 4is a structure schematic view of the sealing limiting piece provided by the embodiment of the utility model;

[0010] Figure 5 is a structure schematic view of the coil assembly provided by the embodiment of the utility model;

[0011] Figure 6 is a cross section structure schematic view of the valve body in the valve device provided by the embodiment of the utility model;

[0012] Figure 7 is a structure schematic view of the valve body in the valve device provided by the embodiment of the utility model.

[0013] 1, electromagnetic assembly;11, first sealing part;12, positioning hole;13, valve seat;14, sleeve;2, coil assembly;21, fourth sealing part;22, second step part;23, second limiting part;24, interface part;25, moving core iron;26, static core iron;27, piston;3, sealing limiting piece;31, second sealing part;32, third sealing part;33, first step part;34, first limiting part;35, positioning pin part;36, body part;4, fixing piece;5, valve body;51, first channel;52, valve chamber;53, valve rod channel;54, first communication channel;55, installation channel;56, second communication channel;57, second channel;58, third channel;59, fourth channel;6, gas tank head;61, gas tank cover;62, gas tank seat;63, diaphragm;64, transmission piece;7, valve rod;8, valve core assembly;81, valve core;82, valve core frame;9, adjusting assembly;91, adjusting seat;92, adjusting spring. DETAILED DESCRIPTION

[0014] The features and exemplary embodiments of each aspect of the utility model will be described below, in order to make the purpose, technical scheme and advantages of the utility model more clear and explicit, the utility model will be further described below by combining with the drawings and specific embodiments. In this article, such relationship terms as "first" and "second" are only used to distinguish one part from another part with the same name, and do not necessarily require or imply any actual relationship or order between the parts.

[0015] Please refer to Figures 1-2 , the valve device includes electromagnetic assembly 1, coil assembly 2, sealing limiting piece 3, fixing piece 4 and valve body 5.

[0016] The sealing limiting piece 3 is located between the electromagnetic assembly 1 and the coil assembly 2, and one part of the sealing limiting piece 3 can be sealingly connected with the electromagnetic assembly 1, and the other part of the sealing limiting piece 3 can be sealingly connected with the coil assembly 2, so that the sealing property between the electromagnetic assembly 1 and the coil assembly 2 can be enhanced after the sealing limiting piece 3 is arranged. In addition, the sealing limiting piece 3 is circumferentially limited with the coil assembly 2, that is, the sealing limiting piece 3 can limit the circumferential rotation of the coil assembly 2. Therefore, through the arrangement of the sealing limiting piece 3, on the one hand, the sealing property between the electromagnetic assembly 1 and the coil assembly 2 can be enhanced, and on the other hand, the sealing limiting piece 3 is circumferentially limited with the coil assembly 2, so that the circumferential position of the coil assembly 2 can be limited, compared with the arrangement of at least two separate components to realize the corresponding functions, the valve device provided in the embodiment of the utility model can realize the composite functions of the sealing of the valve device and the circumferential limitation of the coil assembly 2 through the sealing limiting piece 3, and the structure of the valve device can be simplified.

[0017] Please refer to Figures 3-5 The electromagnetic assembly 1 has a first sealing part 11, the sealing limiting piece 3 has a second sealing part 31, the sealing limiting piece 3 can be sleeved on the outside of part of the electromagnetic assembly 1, and the first sealing part 11 is interference-fitted with the second sealing part 31. It can be conceived that the first sealing part 11 and the second sealing part 31 realize sealing through interference fitting, so that the sealing property between the electromagnetic assembly 1 and the sealing limiting piece 3 is enhanced, and installation is also relatively convenient, without the need to additionally add other fixing parts.

[0018] The sealing limiting piece 3 also has a third sealing part 32, and the third sealing part 32 and the second sealing part 31 can be spaced apart along the radial direction of the sealing limiting piece 3. The coil assembly 2 has a fourth sealing part 21, and the coil assembly 2 can be sleeved on the outside of the sealing limiting piece 3, and the third sealing part 32 is interference-fitted with the fourth sealing part 21. It can be conceived that the third sealing part 32 and the fourth sealing part 21 realize sealing through interference fitting, so that the sealing property between the coil assembly 2 and the sealing limiting piece 3 is enhanced, and installation is also relatively convenient, without the need to additionally add other fixing parts.

[0019] Specifically, the sealing limiting piece 3 comprises a body part 36, and the body part 36 is preferably annular. The annular body part 36 has an inner ring wall, and the second sealing part 31 comprises at least part of the inner ring wall. It should be clear that since the body part 36 is annular, the direction of the center line of the body part 36 is defined as the axial direction, and the direction of the diameter of the body part 36 is defined as the radial direction.

[0020] The electromagnetic assembly 1 comprises a valve seat 13 and a sleeve 14, and a part of the valve seat 13 can extend into the valve body 5 and be fixed to the valve body 5 in a threaded connection. The part of the valve seat 13 outside the valve body 5 can be formed with an annular protrusion, and the first sealing part 11 comprises the annular protrusion. When the sealing limiting part 3 is sleeved outside the electromagnetic assembly 1, the inner annular wall can be in interference fit with the annular protrusion, so as to realize the fixation of the sealing limiting part 3 and the electromagnetic assembly 1 and enhance the sealing between the sealing limiting part 3 and the electromagnetic assembly 1.

[0021] In addition, the part of the valve seat 13 outside the valve body 5 can be fixed to one end of the sleeve 14 in a welding manner. Preferably, the annular protrusion can be welded to one end of the sleeve 14. It should be noted that the outer diameter of the sleeve 14 can be smaller than the inner diameter of the body part 36, so that the body part 36 can easily pass through the sleeve 14, thereby facilitating installation.

[0022] The annular body part 36 also has an outer annular wall, and the third sealing part 32 comprises at least part of the outer annular wall. The coil assembly 2 has a through hole arranged in the axial direction, and the coil assembly 2 also has an inner wall which can form at least part of the through hole. When the coil assembly 2 is sleeved outside the sealing limiting part 3, at least part of the sealing limiting part 3 can be located in the through hole, and the outer annular wall can be in interference fit with the inner wall, thereby enhancing the sealing between the sealing limiting part 3 and the coil assembly 2.

[0023] In order to further enhance the sealing between the sealing limiting part 3 and the coil assembly 2, the outer annular wall of the body part 36 also has a first step part 33, and the first step part 33 and the third sealing part 32 are arranged in the axial direction. The outer diameter of the first step part 33 can be greater than the outer diameter of the third sealing part 32.

[0024] The inner wall of the coil assembly 2 also has a second step part 22, and the second step part 22 and the fourth sealing part 21 are arranged in the axial direction. The inner diameter of the second step part 22 can be greater than the inner diameter of the fourth sealing part 21. When the coil assembly 2 is sleeved outside the sealing limiting part 3, at least part of the sealing limiting part 3 can be located in the through hole, and the outer annular wall can be in interference fit with the inner wall. At this time, the first step part 33 can abut against the second step part 22. The abutting first step part 33 and the second step part 22 also have a certain sealing property, thereby enhancing the sealing between the sealing limiting part 3 and the coil assembly 2.

[0025] Of course, in other embodiments, a step portion can also be provided on the inner ring wall of the body portion 36, and when the sealing limiting piece 3 is in interference fit with the electromagnetic assembly 1, the step portion can abut against the axial end face of the first sealing portion 11, thereby enhancing the sealing between the sealing limiting piece 3 and the electromagnetic assembly 1; or, an annular mounting groove can also be provided on the inner ring wall and the outer ring wall of the body portion 36, and a sealing ring can be arranged in the mounting groove, and when the sealing limiting piece 3 is in interference fit with the electromagnetic assembly 1 and the coil assembly 2, the sealing ring is used to further enhance the sealing between the sealing limiting piece 3 and the electromagnetic assembly 1 and the coil assembly 2.

[0026] Please refer to Figures 3-4 The part of the valve seat 13 located outside the valve body 5 has at least one positioning hole 12, and the number of the positioning hole 12 is not limited. Preferably, the positioning hole 12 is provided as two, and the two positioning holes 12 can be located radially outside the first sealing portion 11 and are distributed in a circle and spaced apart with the first sealing portion 11 as the center. Correspondingly, the body portion 36 has a positioning pin portion 35 integrated on one of the axial end faces, and the positioning pin portion 35 is preferably two. When the first sealing portion 11 is in interference fit with the second sealing portion 31, each positioning pin portion 35 can be inserted into each positioning hole 12 one by one, so as to limit the circumferential rotation of the sealing limiting piece 3, thereby enhancing the stability of the sealing limiting piece 3 after installation.

[0027] It should be noted that the valve seat 13 and the valve body 5 can be connected by threads, and during installation, a tool needs to be inserted into the positioning hole 12 to rotate the valve seat 13, so that the valve seat 13 and the valve body 5 can be threadedly connected. That is to say, even in a valve device without the sealing limiting piece 3, the positioning hole 12 also needs to be machined on the valve seat 13, and the positioning hole 12 can also be used to limit the circumferential rotation of the sealing limiting piece 3, achieving two purposes at once.

[0028] Please refer to Figures 4-5 The body portion 36 has at least one first limiting portion 34 integrated on the other axial end face, and the coil assembly 2 has at least one second limiting portion 23 integrated on the inner wall, and the first limiting portion 34 can be in limiting fit with the second limiting portion 23, thereby limiting the circumferential rotation of the coil assembly 2. It should be noted that the coil assembly 2 includes an interface portion 24, which can be connected with a power supply device in the outside world, so as to energize the coil in the coil assembly 2 and generate a magnetic field. When the coil assembly 2 cannot rotate circumferentially, the orientation of the interface portion 24 has also been fixed, so the first limiting portion 34 can be in limiting fit with the second limiting portion 23, and finally can play a role in fixing the orientation of the interface portion 24.

[0029] The specific structure of the first limiting part 34 and the second limiting part 23 is not limited, as long as the first limiting part 34 and the second limiting part 23 can limit the circumferential rotation of the coil assembly 2 after being connected, and finally fix the orientation of the interface part 24. For example, one of the first limiting part 34 and the second limiting part 23 can include a protrusion, and the other can include a groove, and the protrusion can be inserted into the groove, thereby limiting the circumferential rotation of the coil assembly 2. In a preferred embodiment, the first limiting part 34 includes a protrusion, and the second limiting part 23 includes a groove.

[0030] Preferably, the first limiting part 34 is provided in a plurality, and each first limiting part 34 is distributed along the circumferential direction. Correspondingly, the second limiting part 23 is also provided in a plurality, and each second limiting part 23 is distributed along the circumferential direction. Each first limiting part 34 can be limited and matched with each second limiting part 23 one by one, thereby limiting the circumferential rotation of the coil assembly 2. It is very important that each first limiting part 34 can be limited and matched with each second limiting part 23, in other words, when the first limiting part 34 includes a protrusion and the second limiting part 23 includes a groove, the protrusion can be inserted into different grooves, thereby fixing the orientation of the interface part 24 in different directions. It should be noted that when the valve device is installed in different equipment, the orientation of the interface part 24 of the coil assembly 2 has different requirements, and the valve device provided by the present application can have various orientations of the interface part 24, which is convenient to install in different equipment and has better practicability. In addition, the number of the first limiting part 34 and the second limiting part 23 can be set according to the actual situation, and the more the number of the first limiting part 34 and the second limiting part 23, the more the orientation direction of the interface part 24.

[0031] In order to facilitate the limiting connection of the first limiting part 34 and the second limiting part 23, the height of at least one first limiting part 34 protruding from the body part 36 is greater than the height of the remaining first limiting part 34 protruding from the body part 36. During installation, the first limiting part 34 with greater height can be inserted into the second limiting part 23 first, thereby playing a guiding role. In addition, the size of the end of the first limiting part 34 away from the body part 36 can be smaller than the size of the end of the first limiting part 34 close to the body part 36, which can also play a guiding role. The shape of the second limiting part 23 corresponds to the shape of the first limiting part 34.

[0032] Further, when the first limiting part 34 with greater height is inserted into the second limiting part 23, the third sealing part 32 and the fourth sealing part 21 are not yet in interference fit, thereby playing a better guiding role and facilitating the installation of the sealing limiting part 3 and the coil assembly 2.

[0033] Please refer to Figures 2-4The electromagnetic assembly 1, the coil assembly 2, the sealing limiting piece 3, the fixing piece 4 and the valve body 5 can be installed as a whole. Specifically, the valve seat 13 is threadedly connected with the valve body 5, and one end of the sleeve 14 is welded with the valve seat 13. The other end of the sleeve 14 can be provided with a threaded hole, the fixing piece 4 can be a screw, the end of the sleeve 14 provided with the threaded hole can pass through the coil assembly 2 and be fixed with the fixing piece 4, and the sealing limiting piece 3 is fixed between the electromagnetic assembly 1 and the coil assembly 2. The fixing piece 4 can also be crimped with the end face of the coil assembly 2 away from the valve body 5, so that the fixing piece 4 and the coil assembly 2 are arranged in the axial direction of the sealing limiting piece 3, thereby limiting the axial movement of the coil assembly 2, and then the five are fixed as a whole. In addition, the sealing limiting piece 3 can be made of plastic, so that the sealing limiting piece 3 is in interference fit with the electromagnetic assembly and the coil assembly 2, and the slightly deformed sealing limiting piece 3 can better abut against the electromagnetic assembly 1 and the coil assembly 2, thereby enhancing the sealing between the electromagnetic assembly 1 and the coil assembly 2.

[0034] It is very important that the valve body 5 is not limited in the utility model, for example, the valve body 5 can be used as a valve body of a solenoid valve, a valve body of an expansion valve, or a valve body of another valve.

[0035] Please refer to Figures 6-7 In the preferred embodiment provided by the utility model, the valve body 5 can be used as a valve body of a thermal expansion valve, and additionally, the utility model further comprises an air tank head 6, a valve rod 7, a valve core assembly 8 and an adjusting assembly 9.

[0036] The valve body 5 has a first channel 51, a valve chamber 52, a valve rod channel 53, a first communication channel 54, an installation channel 55, a second communication channel 56, a second channel 57, a third channel 58 and a fourth channel 59. Specifically, the first channel 51 is in communication with the valve chamber 52, the valve chamber 52 can be in communication with the valve rod channel 53, the valve rod channel 53 is in communication with the first communication channel 54, the first communication channel 54 is in communication with the installation channel 55, the installation channel 55 can be in communication with the second communication channel 56, and the second communication channel 56 is in communication with the second channel 57. The third channel 58 is in communication with the fourth channel 59.

[0037] The valve core assembly 8 and the adjusting assembly 9 are arranged in the valve chamber 52. The opening, through which the valve rod channel 53 is connected with the valve chamber 52, is a first valve port. The valve core assembly 8 comprises a valve core 81 and a valve core frame 82, and the valve core 81 is arranged in cooperation with the first valve port, that is, when the valve core 81 abuts against the first valve port, the refrigerant channel is closed, and when the valve core 81 is arranged at a distance from the first valve port, the refrigerant channel is opened. The valve core frame 82 can abut against the valve core 81. The adjusting assembly 39 comprises an adjusting seat 91 and an adjusting spring 92, the adjusting seat 91 is threadedly connected with the side wall forming the valve chamber 52, one end of the adjusting spring 92 abuts against the adjusting seat 91, and the other end abuts against the valve core frame 82.

[0038] In addition, the opening of the second communication passage 56 connected with the installation passage 55 is a second valve port, and the valve seat 13 can be threadedly connected with the inner wall forming the installation passage 55. The electromagnetic assembly 1 can further include a moving core iron 25, a static core iron 26, and a piston 27, the moving core iron 25 is movably arranged in the sleeve 14, the static core iron 26 is fixedly arranged in the sleeve 14, and the piston 27 is arranged in cooperation with the moving core iron 25. The valve device provided by the utility model can be used as a normally open valve device. Specifically, when the coil assembly 2 is powered on, a magnetic field can be generated, the moving core iron 25 can drive the piston 27 to move axially under the action of the magnetic field, and the piston 27 after moving can abut against the second valve port, so as to close the fluid passage. When the coil assembly 2 is powered off, the moving core iron 25 and the piston 27 can move axially and reset under the action of the spring, and the piston 27 is arranged in spaced relation with the second valve port, so as to open the fluid passage. Of course, the valve device provided by the utility model can also be used as a normally closed valve device, that is, when the coil assembly 2 is powered on, the flow passage is opened, and when the coil assembly 2 is powered off, the flow passage is closed.

[0039] The air tank head 6 is fixed to one side of the valve body 5 provided with a third passage 58 and a fourth passage 59. Specifically, the air tank head 6 includes an air tank cover 61, an air tank seat 62, a diaphragm 63, and a transmission member 64. The air tank seat 62 is fixed to the valve body 5, and the air tank cover 61 and the air tank seat 62 are fixed, and the fixing mode can be welding. The diaphragm 63 is located between the air tank cover 61 and the air tank seat 62, and the diaphragm 63 divides the space between the air tank cover 61 and the air tank seat 62 into a closed chamber and an equalizing chamber. The closed chamber is located on the upper side of the diaphragm 63, and the equalizing chamber is located on the lower side of the diaphragm 63. The closed chamber is filled with refrigerant gas. The air tank seat 62 has a through hole, and the equalizing chamber communicates with the third passage 58 and the fourth passage 59 through the through hole. The transmission member 64 is located below the diaphragm 63, the diaphragm 63 can apply a force to the transmission member 64, one end of the valve rod 7 abuts against the transmission member 64, and the other end abuts against the valve core 81. The air tank head 6 and the adjusting assembly 9 jointly act on the valve core assembly 8 to realize the communication or disconnection of the refrigerant passage.

[0040] The first channel 51 can be communicated with the outlet of the condenser, the second channel 57 can be communicated with the inlet of the evaporator, the third channel 58 can be communicated with the outlet of the evaporator, and the fourth channel 59 can be communicated with the inlet of the compressor. Therefore, the specific working principle of the thermal expansion valve is as follows: the refrigerant flows out from the outlet of the condenser, flows into the valve chamber 52 through the first channel 51, when the valve core 81 is spaced apart from the first valve port, the refrigerant can enter the valve rod channel 53, and then enters the mounting channel 55 through the first communication channel 54, when the piston 27 is spaced apart from the second valve port, the refrigerant can enter the second communication channel 56 and the second channel 57, and then flows into the evaporator, and then performs heat exchange in the evaporator, part of the refrigerant after heat exchange directly enters the compressor through the third channel 58 and the fourth channel 159, and the other part of the refrigerant after heat exchange enters the equalizing chamber through the third channel 58, the refrigerant gas in the closed chamber drives the diaphragm 63 to move, the diaphragm 63 drives the valve core assembly 8 to move through the transmission member 64 and the valve rod 7, so as to control the size of the refrigerant flow.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solutions described in the present application, and are not limited to the technical solutions described in the present application. For example, the directions such as "front", "rear", "left", "right", "up", "down" and the like are defined. Although the present application has been described with reference to the above embodiments, it should be understood by those skilled in the art that the technical personnel in the technical field can still modify, combine or equivalently replace the present application, and all technical solutions and improvements which do not deviate from the spirit and scope of the present application should be covered within the protection scope of the present application.

Claims

1. A valve device, characterized by The sealing limiting piece (3) is located between the electromagnetic assembly (1) and the coil assembly (2), one part of the sealing limiting piece (3) is in sealing connection with the electromagnetic assembly (1), another part of the sealing limiting piece (3) is in sealing connection with the coil assembly (2), and the sealing limiting piece (3) is arranged in circumferential limiting mode with the coil assembly (2).

2. The valve device of claim 1, wherein The electromagnetic assembly (1) has a first sealing part (11), the sealing limiting piece (3) has a second sealing part (31), the sealing limiting piece (3) is sleeved outside the electromagnetic assembly (1), and the first sealing part (11) and the second sealing part (31) are in interference fit; The sealing limiting piece (3) further has a third sealing part (32), which is arranged in interval mode with the second sealing part (31) along the radial direction of the sealing limiting piece (3), the coil assembly (2) has a fourth sealing part (21), the coil assembly (2) is sleeved outside the sealing limiting piece (3), and the third sealing part (32) and the fourth sealing part (21) are in interference fit.

3. The valve device of claim 2, wherein The sealing limiting piece (3) comprises a body part (36), the body part (36) is annular, the second sealing part (31) comprises at least part of the inner ring wall of the body part (36); The first sealing part (11) comprises an annular convex part of the electromagnetic assembly (1), and the inner ring wall and the annular convex part are in interference fit.

4. The valve device of claim 3, wherein The third sealing part (32) comprises at least part of the outer ring wall of the body part (36), the fourth sealing part (21) comprises at least part of the inner wall of the coil assembly (2), at least part of the sealing limiting piece (3) is located in the coil assembly (2), and the outer ring wall and the inner wall are in interference fit.

5. The valve device of claim 4, wherein The outer ring wall of the body part (36) has a first step part (33), the first step part (33) is arranged in interval mode with the third sealing part (32) along the axial direction of the sealing limiting piece (3); the inner wall of the coil assembly (2) has a second step part (22), the second step part (22) is arranged in interval mode with the fourth sealing part (21) along the axial direction of the sealing limiting piece (3); and the first step part (33) and the second step part (22) are in abutment.

6. Valve device according to any one of claims 1 to 5, characterized in that The sealing limiting piece (3) comprises a body part (36), one axial end face of the body part (36) is integrated with at least one first limiting part (34), the inner wall of the coil assembly (2) is integrated with at least one second limiting part (23), and the first limiting part (34) and the second limiting part (23) are in limiting fit.

7. The valve device of claim 6, wherein The coil assembly (2) comprises an interface part (24), one of the first limiting part (34) and the second limiting part (23) comprises a protrusion, and the other comprises a groove, the protrusion is inserted into the groove to fix the orientation of the interface part (24).

8. The valve device of claim 6, wherein Both the first limiting part (34) and the second limiting part (23) are provided in plurality and are arranged in interval mode along the circumferential direction. The first limiting parts (34) comprise protrusions, and the height of at least one of the protrusions of the first limiting parts (34) from the body part (36) is greater than the height of the other protrusions of the first limiting parts (34) from the body part (36).

9. Valve device according to any one of claims 3 to 5, characterized in that The electromagnetic assembly (1) has a positioning hole (12), and the other axial end face of the body part (36) is integrated with a positioning pin part (35), and the positioning pin part (35) is inserted into the positioning hole (12).

10. Valve device according to any one of claims 1 to 5, characterized in that The valve device further comprises a fixing part (4) and a valve body (5), the electromagnetic assembly (1) comprises a valve seat (13) and a sleeve (14), the valve seat (13) is fixed with the valve body (5), one end of the sleeve (14) is fixed with the valve seat (13), the other end of the sleeve (14) is connected with the fixing part (4), and the fixing part (4) is arranged along the axial direction of the sealing limiting part (3) and limited by the coil assembly (2).

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